airline
n. countable A2 Elementary Oxford US //ˈɛɹˌɫaɪn// UK //ˈeəlaɪn// air·line
n. a company that provides regular flights for people or goods. You use this word when talking about businesses like Delta, Ryanair, or Emirates.
n. a commercial enterprise providing scheduled air transport services for passengers or freight.
The airline offers cheap flights to Europe.
Most passengers choose their airline based on a combination of ticket price and baggage allowance.
The national airline faced significant financial pressure after a series of strikes led to the cancellation of hundreds of international flights during the peak holiday season.
From air + line.
Usage
Often used as a noun adjunct to modify other nouns, such as in 'airline industry' or 'airline pilot'.